49ers Jim Tomsula talks about the defensive-line rotation

Ask about the fatigue of the 49ers’ defense and particularly, the defensive line at the end of last season, and you will get an argument out of defensive line coach Jim Tomsula.
“First of all the idea that people were worn out at the end of the season, I’m not going for that. I’m not going for that at all,” Tomsula said.
Even though the 49ers defense slipped badly at the end of the season, Tomsula said his substitution pattern was based on a simple formula, as it will be this year.
First, if the defense is constantly forcing 3-and-outs, there won’t be much subbing on the defensive line. “If the drives are longer, we sub,” Tomsula said.
However, substituting is also limited to players on hand. Often, the 49ers went into games with only five defensive linemen. When that happens, Tomsula might not have the bodies and he has to preserve the backups in case someone gets hurt.
Nevertheless, Tomsula might feel more comfortable rotating linemen now that players like Ian Williams, Demarcus Dobbs and Will Tukuafu are more experienced.